Finding the Third Proportional to 305,221.50 and 618,750

Step by Step Solution

1. Step 1: Write the proportion equation
   305,221.50 : 618,750 = 618,750 : x
2. Step 2: Convert to fraction form
   305,221.50/618,750 = 618,750/x
3. Step 3: Cross multiply
   305,221.50x = 618,750 × 618,750
4. Step 4: Simplify right side
   305,221.50x = 382,851,562,500
5. Step 5: Solve for x
   x = 382,851,562,500/305,221.50
6. Step 6: Final answer
   x = 1,254,340.09